GM Officially Rates 6.2-liter L86 Truck Engine at 420 Horsepower

The new 6.2-liter V8 that will be offered in GM’s 2014 full-size truck line will be SAE rated at 420 horsepower at 5,600 rpm with peak torque of 460 lb-ft coming in at 4,100 rpm.

GM made the announcement today and said the engine, code named L86, is the most powerful of any light-duty pickup. The 6.2-liter V8 will be available in the Silverado LTZ and High Country trim levels as well as the GMC Sierra SLT and Denali models. When equipped with the optional Max Trailering Package, the trucks will boast a 12,000-pound tow capacity.

Other engines for the GM trucks include a 4.3-liter V6 and 5.3-liter V8.

The L86 is part of the new Gen V small-block family of engines that debuted last year. EngineLabs covered the introduction and followed up with an in-depth analysis of the optimized combustion system. Other Gen V engines in the new Silverado include a 4.3-liter LV3 V6 rated at 285 horsepower and 305 lb-ft peak torque, as well as a 5.3-liter L83 V8 certified at 355 horsepower and 383 lb-ft torque.

The Chevy Corvette is the only other Gen V-equipped vehicle at this time with a 6.2-liter LT1 V8 rated at 460 horsepower at 6,000 rpm with optional exhaust system (465 lb-ft torque). Standard rating is 455 horsepower with 460 lb-ft torque. See our comparison of the Corvette and truck engines here.

All Gen V engines feature direct injection, Active Fuel Management (AFM) and continuously variable valve timing. And like traditional small-block engines that have been around since 1955, the Gen V small-blocks are single-cam, overhead-valve design and feature a 4.400-inch bore center.

When properly equipped, GM trucks with the 6.2-liter engine will have a 12,000-pound max towing capacity.

About the author

Mike Magda

Mike Magda is a veteran automotive writer with credits in publications such as Racecar Engineering, Hot Rod, Engine Technology International, Motor Trend, Automobile, Automotive Testing Technology and Professional Motorsport World.
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